Telescopic protector



July 11, 1950 s. s. ROBERTS TELESCOPIC PROTECTOR 4 Sheets-Sheet 1 Filed Feb. 12, 1946 INVENTOR. Jam/e/ 5. Robe/[J July 11, 1950 s. $.ROBERTS TELESCOPIC PROTECTOR 4 Sheets-Sheet 2 Filed Feb. 12, 194

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' INVENTOR. JO/Wue/ J. Roberts BY A TTOR/VE Y y 1950 s. s. ROBERTS 2,514,721

'rnusscoPic PROTECTOR Filed Feb. 12, 1946 4 Sheets Sheet 3 Jig. 7.

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50/271/2/ (S. Roberts Ad ffw ATTORNEY y 1950 s. s. ROBERTS 2,514,721

TELESCOPIC PROTECTOR Filed Feb. 12, 1946 4 She ecs-Sheet 4 INVENTOR.

Jamue/ d. Robe ts A r TORA/E Y XYZLA A% Patentecl July 11, 1950 UNITED STATES PATENT OF F ICE 2,514,721 TELESCOPE PROTECT'UR Samuel S. Roberts, Pittsburgh; Pa.

Application-February 12, 1946QSeria1 No. 647,051

I, This invention relates tea telescopic protector for traversing screws and th'el'ike" and'is particularly adapted for protecting the screw-downs of rolling mills against abrasive dirt and scale which are incidental to rolling operations. Various types of these devices are inuse, suchas dis-' closed in my'Pa'tent No. 2,061,331,. dated Novem-- ber" 17, 1936, but they" all have various drawb'acks. For example, my previous protector'could n'ot be'successfully" used in a horizontal position and, in addition, its parts'sometimes beoame'sep'a rated in" hard usage.

It is an object of'my' invention to providea telescopic protector which i's non s'eparable, rigid, and has positive'acti'on in either direction.

Another object is to provide such a protector which is provided with a seal which can be removed' and renewed without dismantlingthe'protector.

A still further object is to provide a protector which can be used in a horizontal position.

These and other objects" will be more apparent after referring to the following specification and attached drawings, in which? Figure 1' is a View, partly'in section, of my protector in place on a verticalscrew -down of a rolling! mill; 7 I

Figure 2" a view taken on the line IIII of Figurelr Figure 4 is a sectional view taken on the line iV-IV of Figure 2 and showing the protector in" n'ested'positio'n; 1

Figure 5 is a sectional view of my protector when used in ahorizontal position; A

Figure 6' is a view taken on the line VI'V'I* of Figure 5;

Figure 7 is an enlarged sectional view. taken on" the'line VII-VIIofFigure8; I

Figure 8' is an enlarged detail of a modification;

Figure 10 is an enlarged view, partly in section, of a modification; and I j Figure 11 is a view, partly'in' section, oi'fa fur-" ther modification. v

Referring more particularly to the drawings, Figures 1 1:04 disclose my protector as applied to a vertical screw-down. The reference numeral 2" indicates the roll housing" which has a housing nut dmounted therein. A screw 6 passes'through the nut 4' and engages the roll bearing chuck 8' which supports" the roll Ill; "The protector boot [2 of myinvention surrounds the" screw 6 and 1% claims; (01; 7 1 608 Figure 9' is a View of the spring'used in Figure'l;

extends Between the housing" 2' and th chuck 8; The" boot I: is made ofa plurality'of individualrings l3; M and It which increase" in widthand decr ase iii diameter'from one end of 'tlrie protector tothe other end. As shown thering havingtli'e maximum diameter and minimum width" of height i's'at'the'top'; The construction oftheprotecto'r, I2 is the same regardless ofwh'ether'it used in a vertical or horizontal position and the details" are? best shown in Figures 5 and 10: The top" ring in is provided: with an outwardly extending flange H5 at its: upper" end to which is fastened an outwardly extending annular ancho'rage plate [8 having a plurality of holes" 26 therein. An annulus 22,.havinga substantially square cross section, is welded to the inside portion of the overlapping end of the upper ring I4 The bottom ring I3' and intermediate rlng's l5 are provided with outwardly extending flanges' 23 at their lower or overlapping en'ds; Welded to the inside of the overlapping'e'nd of each of the rings i5 is an annulus" 22 identical with "the one welded to the top ring M1 An ann'ulus 26, similar to the annulus 22, iswelde'd t6 the top outside surface of each of the rings 3' and I5. The corners of the annuli 2'2 and 26 opposite the weld are rounded to provide flexibility in the protector boot' I2. The anfiulii 22" and 26 form inwardly extending flanges on the overlappingv end and outwardly extending'j flanges on the underlappi'n'g' end of the rings with the length Of the flanges being substatitia'lly equalto one-half the difference between the inside diameter of the overlapping ring and the outside diameter of the un'derlapping ring". An annular anchorage plate 28 having a plurality of holes 38 therein is Welded to the flange M of the bottom" rin l3. The top anchorage plate I8 is fastened to the housing 2' by m'ear'is' of cap screws 32 and the bottom annular anchorage plate 28 is fastened to the chuck 8' by means of' cap screw's'S-A. As" the screw 6 is raised or lowered, it moves the chuck 8 with respect to the housing 2' and the telescoping rings 13", II" and l5 are positivelymoved with respect to one another regardless of the direction of' movement because of the positive connection with the housing 2 and chuck B. The increase in width of the rings as they'decrea'se in diameter is approximately an amount equal to the thickness of the flange 24' so that the rings are closely nested in retracted position, as shown in Figure 4. Thus; it is possible to obtain greater travel with the same closure. As shown in Figures 2 and 4, a plurality of spaced apart downwardly extending lugs 36 may be welded to the ring l8. L- shaped lugs 38, spaced apart in the same manner as lugs 36, are welded to the lower plate 28. When it is desired to keep the protector boot 12 in retracted position, such as when removing the chuck 8, the screws 34 are removed and the adjusting screw 6 raised to its top position. Pins 48 are then placed in matching holes in the lugs 36 and 38 to hold the protector [2 in the retracted position shown in Figure 4.

It is often desirable to have an oil-tight dust proof enclosure around the adjusting screw, Figures 7, 8 and 9 disclose a modification for making the protector l-2 oil-tight and dust proof, In this construction the annulus 22 is replaced by a triangular annulus 42 having its bevelled face 4 ing in part 62. The arms 54, instead of being fastened to a spring 56, are provided with brackets 66 at their outer ends. The brackets are provided with openings having the same shape as bar 64 and as the parts 60 and 82 are moved together, the arms 54 slide over the rod 64.

When it is desired to protect a horizontal shaft or plunger 10 (Fig. 11) instead of a screw, the arms 54 and flanges 24 may be omitted and replaced by guide rings 12 fastened to the inside of the .underlappingv ends-of. the rings [5- adjacent the annulus 26. The guide rings 12 are provided with openings of approximately the same size as extending inwardly away from flange 24. A split I packing ring 44, having a triangular shape complementary to that of the annulus 42, is; placed in the opening between the annulus 42 and the ring i4. A rin follower 46 is placed on the pack ing ring 44. Self-take-up of the sealing ring 44, to compensate for wear, is accomplished by inserting flat curved springs 48 between the ring follower 46 and anchorage clips 50, which are arranged around the periphery of the protector at spaced intervals. The clips 50, which are chane nel-shaped and have one leg shorter than the other, are slipped over the flanges 24 with the short leg beneath the flange and the long leg extending over the packing ring 44. Pin punch prick marks 52 flx the clips to the flange 24 and the springs 48 to the clips 50. The springs 48 exert constant pressure on the packing, thus causing the packing ring to slide inwardly over the inclined surface of the annulus 42.

The installation of the protector boot l2 'in a horizontal position is shown in Figures 5 and 10. The construction of this boot is the same as that ofthe vertical boot and the same reference characters are used to designate the parts thereof. As shown in Figure 5, the rings l5 are maintained in their vertical position by means of counterpoise arms 54 welded to the flanges 24. The arms 54 are provided with two vertical portions connected by a horizontal portion as shown. The horizontal portions of the arms gradually decrease in diameter from the ring of smallest diameter so that they will fold in the closure space. The second vertical portion of the arm is approximately above the center of its ring l5. Attached to the top of this arm is a spring 56 which is suspended to the panel pivot of a pantograph 58 which is attached to the relatively movable parts'fifl and 62. At the parts'fifl and 62 move together theparts of the pantograph and the rings of the protector I2 move toward their collapsed position with the rings and the pantograph substantially maintaining their position with respect to one another. The springs 56 provide flexibility between the ring sections [5 and the pantograph 58 as the boot [2 contracts and expanels, thus preventing binding during movement of the boot. In case no spaceis available for an overhead mounting, an underslung folding gate provided with compression instead of extension springs maybe used to provide the moving support for the arms 54. p

In place of the pantograph 58 and springs 56, a guide rod 64 may be fastened between the sup- ,the shaft I0 being protected so that the shaft acts as a support to maintain the rings I 3, l4 and [5 in their vertical position while the rings slide thereover.

While several embodiments of my invention have been shown and described it will be apparent that other adaptations and modifications may be made without depaitingfrom the scope of the following claims.

I claim: f I

L'Atelescopic protector for traversing screws and the like comprising a plurality'of overlapping rings, a'n inwardlyextending" flange on the overlapping end of each ring, anjoutw'ardly'e-Xtending'flang'e on the underlapping'end of each .ring, the length of said flanges being substantially equal to one-half the difference between the in side diameter of ,the overlapping ring and the outside diameter of the underlapping ringfthe flange on the overlappingend being shaped to provide a chamber between it and the underlapping end, saidchaifnber'being open to the outside of .the protector, packing in said opening, an outwardly extending flange on the overlapping end of each of the rings except the one having the largest diameterjand separable means fastened to the last named flange for holding the packing inplac'e'. I f

2 A telescopic protector for traversing screws and the like comprising a plurality of overlappingrings, an inwardly extending flange on the overlapping end of each ring, an outwardly extending flange on the underlappingendof each ring, the length of'sa'id flanges being substantially equal toone-half the differencebetwee'nthe inside diameter of the overlapping ring and, the outside diameter of, the. underlap ping ring, the

' flange on theov'erlapping end having a beveled inner face, a packing ring having a complem'enta'ry' beveled outer fac'e'located in the opening between the underlapping end and the beveled in,-. ner faceof the flange, an outwardly extending flange on the overlappingend of, each of the rings and the like comprising a plurality of overlapportsfiil and62'. This construction is only pos-' ping rings which progressively decrease indiameter fromone end to the other, an inwardly extending'flange on the overlappingend of each ring, an outwardly extendingflange on the underlapping, endv of each ring, the length of said flanges being substantially equal to one-half the difference between the inside diameter of the overlapping ring and the outside diameter of the underlap'ping'ring, and an outwardly extending flange on the overlapping end of each of the smaller diameter rings, said last named flange cooperating with the other flanges to prevent over-riding ofjthering sections, each of said rings being widerthan the 'lafrger diameter ring adja-v cent thereto an amount substantially equal to the thickness ofthe'last named flange;

4. A horizontal telescopic protector for traversing screws and the like comprising a plurality of overlapping rings which progressively decrease in diameter from one end to the other, counterpoised arms connected to the overlapping end of at least some of the intermediate rings, each of said arms having a horizontal portion between oppositely extending vertical portions, the distance of the horizontal portions from the centerline-of" the protector decreasing from the smallest diameterring to the-largest diameter ring so that the horizontal portions will fold into one another, a horizontal support; and means for connecting the outer verticalportions of said arms to the support.

5. A horizontal telescopic protector for traversing screws and the like comprising a plurality of overlapping rings which progressively decrease in diameter from one end to the other, an inwardly extending flange on the overlapping end of each ring, an outwardly extending flange on the underlapping end of each ring, the length of said flanges being substantially equal to one-half the difference between the inside diameter of the overlapping ring and the outside diameter of the underlapping ring, an outwardly extending flange on the overlapping end of each of the smaller diameter rings, counterpoised arms connected to at least some of the last named flanges, each of said arms having a horizontal portion between oppositely extending vertical portions, the distance of the horizontal portions from the centerline of the protector decreasing from the smallest diameter ring to the largest diameter ring so that the horizontal portions will fold into one another, a horizontal support and means for connecting the outer vertical portions of said arms to the support.

6. A horizontal telescopic protector for traversing screws and the like extending between relatively movable parts comprising a plurality of overlapping rings which progressively decrease in diameter from one end to the other, counterpoised arms connected to the overlapping end of at least some of the intermediate rings, each of said arms having a horizontal portion between oppositely extending vertical portions, the distance of the horizontal portion from the centerline of the protector decreasing from the smallest diameter ring to the largest diameter ring so that the horizontal portions will fold into one another, a pantograph haVing its opposite ends attached to the relatively movable supports, and a spring for connecting the outer vertical portion of each arm to one'of the panel pivots of the pantograph.

7. A horizontal telescopic protector for traversing screws and the like extending between relatively movable parts comprising a plurality of overlapping rings which progressively decrease in diameter from one end to the other, an inwardly extending flange on the overlapping end of each ring, an outwardly extending flange on the underlapping end of each ring, the length of said flanges being substantially equal to one-half the difference between the inside diameter of the overlapping ring and the outside diameter of the underlapping ring, an outwardly extending flange on the overlapping end of each of the smaller diameter rings, counterpoised arms connected to the overlapping end of at least some of the last named flanges, each of said arms having a horizontal portion between oppositely extending vertical portions, the distance of the horizontal portions fromthe centerline of the-rings decreasin from the smallest diameter ring to the largest diameter ring so that the hori-zorital portions will fold into one another, a pantog'rapli having its opposite ends attached to the relatively movable supports,- and a spring for connecting the outer" vertical portion of each arm to one ofthe'p'anel pivots-of the pantogr aph.

8. A horizontal telescopic protector for traversing screws and the like extending between relatively movable parts comprisinga pluralityofoverlapping rings which progressively decrease in diameter from one end to the other; counterpoised-arms connected to the overlapping end-of at leastsome of the intermediate rings, each of said arms having a horizontal portion between oppositely extending vertical portions, the distance of the horizontal portions from the centerline of the rings decreasing from the smallest diameter ring to the largest diameter ring so that the horizontal portions will fold into one another, a horizontal bar having one end rigidly attached to one of the relatively movable parts and the other end slidably mounted in the other of said movable parts, and a bracket connected to the outer vertical portion of each arm, each of said brackets having an opening therein for slidably receiving said bar.

9. A horizontal telescopic protector for traversing screws and the like-extending between relatively movable parts comprising a plurality of overlapping rings which progressively decrease in diameter from one end to the other, an inwardly extending flange on the overlapping end of each ring, an outwardly extending flange on the underlapping end of each ring, the length of said flanges being substantially equal to one-half the difference between the inside diameter of the overlapping ring and the outside diameter of the underlapping ring, an outwardly extending flange on the overlapping end of each of the smaller diameter rings, counterpoised arms connected to the overlapping end of at least some of the last named flanges, each of said arms having a horizontal portion between oppositely extending vertical portions, the distance of the horizontal portions from the centerline of the rings decreasing from the smallest diameter ring to the largest diameter ring so that the horizontal portions will fold into one another, a horizontal bar having one end rigidly attached to one of the relatively movable parts and the other end slidably mounted in the other of said movable parts, and a bracket connected to the outer vertical portion of each arm, each of said brackets having an opening therein for slidably receiving said bar.

10. A horizontal telescopic protector for traversing screws and the like comprising a plurality of overlapping rings which progressively decrease in diameter from one end to the other, a horizontal support and means connected to at least some of the intermediate rings and to the horizontal support for maintaining the rings in their vertical position.

11. A telescopic protector for traversing screws and the like comprising a plurality of overlapping rings, an inwardly extending annulus welded to the overlapping end of each ring, an outwardly extending annulus Welded to the underlapping end of each ring, the annuli having an outside diameter substantially equal to the inside diameter of the overlapping ring and an inside diameter substantially equal to the outside diameter of the underlapping ring, and an outwardly extending flange on the overlapping end of each of end of ,each ring, the length of said flanges being 10 substantially equal to one-half the difierence between the inside diameter of the overlapping ring and the outside diameter of the underlapping ring, and an outwardly extending flange on the overlapping end of each of the smaller diameter 15 8, rings, said lastnamed flange cooperating with'th other flanges to prevent over-riding of the ring sections. r

SAMUEL S. ROBERTS.

REFERENCES CITED The following'references are of record in the file of this patent:

UNITED STATES PATENTS Number I Name Date 414,903 Godillot Nov. 12, 1889 459,769 Russell Sept. 22, 1891 859,637 Adams July 9, 1907 2,061,331 Roberts Nov. 17, 1936 2,220,068

Eckhardt Nov. 5, 1940 

